Jun 20, 2018 - On the case back, their watch will have a serial number and a model number matching that on its paperwork. The watch model number is the one the is number on top, beginning with a letter. In some cases the watch model number can be standing alone, or right above the displayed movement on an exhibition case.
Seiko Watch Corporation has been designing and manufacturing quality watches since 1881. Each Seiko watch has a unique serial number that can be used to identify the specific series, model and year of the watch. Because Seiko produces a variety of designs, styles and brands, the serial number becomes the main identification tag for each product.